Type-C PHYs are taking longer than expected for Aux IO Power Enabling.
Workaround: Increase the timeout.
---v2
-change style on how we mention WA [Ankit]
-fix bat error by creating new func that is only called for aux power
well scenarios so we can avoid null pointer error as it is called
everywhere.
--v3
-Add non-default enable_timeout to power well descriptor which avoids
adding more platform checks [Imre]
--v4
-Remove Bspec link from top to bottom remove WA link from commit put it
on comment [Jani]
-enable_timeout in ms and add .fixed_enable_delay too [Imre]
--v5
-move power_wells instead of duplicating them [Imre]
Bspec: 55480
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Imre Deak <imre.deak@xxxxxxxxx>
Signed-off-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display_power_map.c | 7 +++++++
drivers/gpu/drm/i915/display/intel_display_power_well.c | 3 ++-
drivers/gpu/drm/i915/display/intel_display_power_well.h | 2 ++
3 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c b/drivers/gpu/drm/i915/display/intel_display_power_map.c
index 6645eb1911d8..b4070845cd53 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_map.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c
@@ -1378,6 +1378,11 @@ static const struct i915_power_well_desc xelpd_power_wells_main[] = {
I915_PW("AUX_C", &icl_pwdoms_aux_c, .hsw.idx = ICL_PW_CTL_IDX_AUX_C),
I915_PW("AUX_D", &icl_pwdoms_aux_d, .hsw.idx = XELPD_PW_CTL_IDX_AUX_D),
I915_PW("AUX_E", &icl_pwdoms_aux_e, .hsw.idx = XELPD_PW_CTL_IDX_AUX_E),
+ ),
+ .ops = &icl_aux_power_well_ops,
+ .fixed_enable_delay = true,
+ }, {
+ .instances = &I915_PW_INSTANCES(
I915_PW("AUX_USBC1", &tgl_pwdoms_aux_usbc1, .hsw.idx = TGL_PW_CTL_IDX_AUX_TC1),
I915_PW("AUX_USBC2", &tgl_pwdoms_aux_usbc2, .hsw.idx = TGL_PW_CTL_IDX_AUX_TC2),
I915_PW("AUX_USBC3", &tgl_pwdoms_aux_usbc3, .hsw.idx = TGL_PW_CTL_IDX_AUX_TC3),
@@ -1385,6 +1390,8 @@ static const struct i915_power_well_desc xelpd_power_wells_main[] = {
),
.ops = &icl_aux_power_well_ops,
.fixed_enable_delay = true,
+ /* WA_14017248603: adlp */
+ .enable_timeout = 500,
}, {
.instances = &I915_PW_INSTANCES(
I915_PW("AUX_TBT1", &icl_pwdoms_aux_tbt1, .hsw.idx = TGL_PW_CTL_IDX_AUX_TBT1),
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
index 62bafcbc7937..930a42c825c3 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
@@ -253,6 +253,7 @@ static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
{
const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
+ int timeout = power_well->desc->enable_timeout ? : 1;
/*
* For some power wells we're not supposed to watch the status bit for
@@ -266,7 +267,7 @@ static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
/* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */
if (intel_de_wait_for_set(dev_priv, regs->driver,
- HSW_PWR_WELL_CTL_STATE(pw_idx), 1)) {
+ HSW_PWR_WELL_CTL_STATE(pw_idx), timeout)) {
drm_dbg_kms(&dev_priv->drm, "%s power well enable timeout\n",
intel_power_well_name(power_well));
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.h b/drivers/gpu/drm/i915/display/intel_display_power_well.h
index ba7cb977e7c7..e494df379e6c 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.h
@@ -110,6 +110,8 @@ struct i915_power_well_desc {
* Thunderbolt mode.
*/
u16 is_tc_tbt:1;
+ /* Enable timeout if greater than the default 1ms */
+ u16 enable_timeout;
};
struct i915_power_well {
--
2.25.1
